The speed limits in the United Kingdom are in mph (miles per hour), and show the maximum speed on the roadsigns that motorists are allowed. In built up parts of the towns and cities, the speed limit is normally thirty miles per hour, unless otherwise stated. The speed limit on the motorway for most vehicles is normally 70 miles per hour unless the roadsigns state otherwise.
When driving on motorways and dual carriageways, motorists are expected to keep to the inside or left most lane unless overtaking other road users. This applies mostly unless road signs state that the inside lane is to be used for traffic leaving at the next junction. Motorists who want to overtake other vehicles should move to the next outside lane (safely) to overtake the slower vehicle, and then as soon as safely possible, move back to the inside lane.
The speed limits of the vehicles in the UK is also very defined and refined to control the rate of accidents, and to pay attention to people unsafe attitudes. Sometimes belts are not fastened, and cuts are taken which are not safe for anyone and all these attitudes are charged with strict rule and based on the law of the UK. The inappropriate behaviors of the drivers on the road are not tolerated by the legal persons. The law is improving and tightening than before.
The following of traffic lights is also the major concern to abide by the laws and to move in the right way. The function of the drivers is to know and follow the lights and understands that what they are signaling to them and which lane they should move according to the path they want to move on. The flashing of light and the lane disciplines if followed with care, they will never cause you any harm and loss. The law and citizens all stays happy after the total protection and agreement of the laws. This is of course for the safety and betterment of humanity and nation.